Berry, S.L., Graham, T.W., Mongini, A. and Arana, M. 1999. The Efficacy of Serpens spp bacterin combined with topical administration of lincomycin hydrochloride for treatment of papillomatous digital dermatitis (footwarts) in cows on a dairy in California. The Bovine Practitioner. 33, 1 (Jan. 1999), 6–11. DOI:https://doi.org/10.21423/bovine-vol33no1p6-11.